Inking-plate for job-presses.



No. 742,765. PATENTED ooT. 27, 1903.

F. w; WBBER. INKING PLATE FOR JoB PRBssEs.

PPPPPPPPPPPPPPPPP AB.. 12, 1903.

OOOOOO L.

v'e. mares.

Patented October 27, 1903.

FRANK W. WEBER, or TRENTON, NEW JERSEY;

INKING-PLATE F'oR JoB-PREssEs.

srEcIricA'rIoN forming pm of Letter: r

ment No. '742,765, aate ctoter 27, mos.

Application filed March 12, 1903. Serial No. 147,511. (No model.)

To all whom it may concern.-

Be itknown that I, FRANK W.WEBER,a citizen of the United States,residing at Trenton, in the county of Mercer and State of New Jersey,have invented new and useful Improvements in Inking-Plates forJob-Presses, of which the following is a specification.

My invention relates to printing-presses, and particularly to the classknown as jobpresses or those constructed with an inkingplate which isengaged by the press-rollers.

The object of the invention is to provide a detachable cover for theinking-plate readily applied thereto and detached therefrom, therebysaving considerable time usually required to clean the plate whendifierent colors of ink are used and avoiding the discoloring ofdelicate tints and colors.

The invention consists of a non-flexible disk, preferably made ofcopper, wood, papiermch, or any kind of metal or metal alloy coated withshellac,varnish, porcelain, or any material which is non absorbent ornonporous.

The improvement also consists in providing the disk-cover Withperipherally-a'rranged fastening devices to engage the edge of theinking-plate, Whereby the cover may be fastened to the latter.

The nature of the invention will be better understood by reference tothe accompanyin g drawings, in which- Figure 1 is a sectional viewthrough the ordinary form of ink-disk and part of the mechanism forrotating it and showing my invention applied, and Fig. 2 is a bot-tomplan view'of the cover-disk.

The cover of the inking-plate comprises a circular disk 1, preferablymade of metal or any other suitable material and having downwardly andinwardly turned peripherall flanges 2, which form .tubular seats for thereception of a ring of spring-wire, (designated by the reference-numeral3.) These seats are equidistantly disposed and spaced apart a suffieientdistance to permit the spring-jaws 4 to be swung toward and away fromthe bottom surface of the disk. The jaws 4 are formed by providingapproximately U -shaped kinks in the wire ring 3 at determined intervalsand are disposed between the ends of the These jaws normally rest withinthe seats 2.

' edge of the disk, but can be swung outwardly beyond the edge, as shownin dotted lines in Fig. 2. As the ring is made of spring metal and thenormal disposition of the jaws is as shown in Fig. 2, they willimmediately spring back to assulne their normal position as soon as thecover is tension on the jaws Will be suflicient to prevent adisplacement of the cover under any conditions to which the device wouldordinarily be subjected.

The fastening device can be applied to a cover of ordinary metal havingabsprbent properties, if it is desired to use such a cover; but I find aconsiderable advantage results from coating the top surface of the disk1 with an impervious material, such as glass, porcelain, shellac,varnish, or other suitable material. The advantage of glazing the topsurface of the disk 1 is that the pigments of the various colored inkscannot be absorbed by the cover or ink-plate, and when it is desired tochange the ink the surface of the cover can be cleaned t-horoughly andquickly, owing to the non-porosity of the same.

It will be apparent that a cover constructed in accordance with myinvention will possess sufficient rigidity to retain the ink evenly overthe surface thereof and that it can be readily applied to and detachedfrom the ordinary ink-plate, thus resulting in considerable saving oftime in the manipulation of the press and avoiding the discoloring ofdelicate tints and colors.

Having thus described my invention, what I claim as new is-- 1.v Acombination with the ink-distributing plate of a printingpress, of adetachable cover therefor comprising a rigid disk having a porcelainink-retaining outer surface, and fastening means carried by the coverfor engagernent with the inking-plate.

2. A combination with the ink-distributing plate of a printing press, ofa detachable cover therefor comprising a rigid disk having a porcelainink-retaining outer surface, and spring-actuated fastening means carriedby the cover for engagement with the inkingplate.

3. A combination with the ink-distributing plate of a printing press, ofa detachable cover therefor comprising a rigid disk having IOO aporxcelan ink-retaining outer surface, and comprising a ring bent toform spring engaging jaws for engagement with the plate.

4. A covez1 for an ink-distributing plate for a printing pressoomprising a rigid disk, downwardly and inwardly bent flanges earried bythe periphery of the disk and forming seats, said seats being spacedapart, and approximately U-shaped engagng devices carried by the seatsto engage the inking-plate to removably fasten the cover thereto, the

outer or nk-retaining surface of said cover being coated with animpervious and nonporous Substance thereby avoiding all chem-l icalaction, and preserving the laster and tone, of the various colored inks.

In testilnony whereof I affix my signature in presence of two witnesses.

FRANK W. WEBER. Witnesses:

` CHARLES H. HEALD, GEORGE GUTHRIE.

